Improvement in pump-valves



A. W. WHITE. Pump Valve.

No. 202,128. Patented April 9,1878.

. N-FETERS, PHOTO-LITHOGHAFHER. WASHINGTON. O

UNITED STATES PATENT OFFICE.

ARCHIBALD W. WHITE, .0]? SAN JOSE, CALIFORNIA.

IMPROVEMENT IN PUMP-VALVES.

Specification forming part of Letters Patent N 0. 202,128, dated April9, 1878 application filed February 25, 1878.

To all whom it may concern:

Be it known that I, ARoHmALD W. WHITE,

" of San J os, Santa Clara county, and State of California, haveinvented a certain Improvement in Pump-Valves; and I hereby declare thefollowing tobe a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, making part of thisspecification, in which 4 Figure 1 is a side elevation. Fig. 21savertical cross-section. v

The object of my invention is to provide a pump-valve which is cheap inconstruction and sure in operation; and it consists in a cylindricalvalve, provided with a corrugated stem, so as to reduce friction to theminimum, working in a vertical cylindrical guide, held in position by across-piece, ears, and bolts, as hereinafter more fully described.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the mannerin which I carry it out.

In the said drawings, Gris the valve-seat in the piston of a lift-pump.It is centrally located, and rises as a lip from the main body of thepiston. On the upper edge of this seat rests the packing P of a circularvalve, F, corresponding in size to seat G, and provided with a verticalstem, I, having parallel corrugations a a throughout its length. Thisstem Works in a cylindricalguide, E, having supports N, and securelybolted to the piston by means of bolts i 2' and proper nuts.

The inside surface of cylinder E being smooth, and the valve-stem beingcorrugated,

it is evident that, though the stem is always

